CVE-2026-86144
libxml2 XInclude Improper Flag Propagation Vulnerability
Description
In xinclude in libxml2 before 2.15.4, xmlXIncludeProcess and xmlXIncludeProcessTree do not propagate parseFlags. This has security relevance for, for example, the XML_PARSE_NONET flag, if (without it) a custom resource loader accesses the internet and triggers XML external entity injection, SSRF, or a denial of service (e.g., for an attacker-controlled internet resource that is intentionally slow).
INFO
Published Date :
Sept. 5, 2026, 5:17 a.m.
Last Modified :
Sept. 5, 2026, 5:17 a.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 8254265b-2729-46b6-b9e3-3dfca2d5bfca | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] |
Solution
- Update libxml2 to version 2.15.4 or later.
- Apply vendor-provided patches for libxml2.
- Review and configure resource loader access controls.
- Enable XML_PARSE_NONET flag for resource loading.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-86144.
| URL | Resource |
|---|---|
| https://github.com/GNOME/libxml2/commit/b63cd517afecb76582dd9488c55e54ceaf50de61 | |
| https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-86144 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-86144
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-86144 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-86144 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by [email protected]
Sep. 05, 2026
Action Type Old Value New Value Added Description In xinclude in libxml2 before 2.15.4, xmlXIncludeProcess and xmlXIncludeProcessTree do not propagate parseFlags. This has security relevance for, for example, the XML_PARSE_NONET flag, if (without it) a custom resource loader accesses the internet and triggers XML external entity injection, SSRF, or a denial of service (e.g., for an attacker-controlled internet resource that is intentionally slow). Added CVSS V3.1 AV:L/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L Added CWE CWE-669 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/86xxx/CVE-2026-86144.json">CVE-2026-86144</a> Added Reference https://github.com/GNOME/libxml2/commit/b63cd517afecb76582dd9488c55e54ceaf50de61 Added Reference https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4